Stall warning horn..

[Ron Attwood]

...It suddenly failed to make itself known. Anyone else?

[Nick - A2A]

Have you wibbled your stall warning vane recently Ron? It's my favourite part of the pre-flight... Maybe you've got caterpillars nesting in it or something!

[whoispankaj]

When the propeller can be chewed I am sure that would also be modelled in accusim


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[Ron Attwood]

Have you wibbled your stall warning vane recently Ron? It's my favourite part of the pre-flight... Maybe you've got caterpillars nesting in it or something!

Oh yes, it wibbled like anything.

EDIT: Just did another flight and have a guess...

[Nick - A2A]

EDIT: Just did another flight and have a guess...

Caterpillars? These damn A2A planes are full of bugs!

[Lewis - A2A]

If you insist in sticking your old paint brushes in it Ron I keep telling you it will cause 'issues!'

cheers,
Lewis

[goughie]

I'm with Lewis on this ...seriously though, what are the flight conditions when you suspect a stall warning failure? Eg, angle of attack, indicated airspeed?

[goughie]

I'm assuming we are referring to the C182 but the system is identical to the C172 as you know but the stall speed may vary. Btw, does the comment ' did another flight and have a guess...' Mean the problem is resolved?

[lonewulf47]

...I'm assuming we are referring to the C182 but the system is identical to the C172 as you know but the stall speed may vary...

Not quite . the C182 uses a switch at the leading edge (equal to the Cherokee), which will be activated due to changed airflow over the leading edge as soon as a certain AoA is exceeded, whereas the C172 uses a reed-type "clarinet" which is activated by the same reason, however directly driven through the existing vacuum.

[Ron Attwood]

. Btw, does the comment ' did another flight and have a guess...' Mean the problem is resolved?

What do you reckon? It was probably a non issue in the first place.

[Ron Attwood]

I'm with Lewis on this ...seriously though, what are the flight conditions when you suspect a stall warning failure? Eg, angle of attack, indicated airspeed?

If I remember correctly, a 15kts headwind, from 50kts down to 40kts in the flare. Which resulted in a nice touch down. I was waiting for the beep/chirp but just got the chirp. Maybe it was the headwind?

[goughie]

...I'm assuming we are referring to the C182 but the system is identical to the C172 as you know but the stall speed may vary...

Not quite . the C182 uses a switch at the leading edge (equal to the Cherokee), which will be activated due to changed airflow over the leading edge as soon as a certain AoA is exceeded, whereas the C172 uses a reed-type "clarinet" which is activated by the same reason, however directly driven through the existing vacuum.

My mistake. Thanks for the info .

[goughie]

I'm with Lewis on this ...seriously though, what are the flight conditions when you suspect a stall warning failure? Eg, angle of attack, indicated airspeed?

If I remember correctly, a 15kts headwind, from 50kts down to 40kts in the flare. Which resulted in a nice touch down. I was waiting for the beep/chirp but just got the chirp. Maybe it was the headwind?

I get the same variation, sometimes a little beep on touchdown, sometimes not. Its nice to hear the stall horn as you touch down. I think the AoA has something to do with it, who knows, at least it means your landings are good!